calling from CUCM extension to 3CX extension

[pbinojgeorge@gmail.com]

How I can call from cucm extension to 3cx extesnion

I have created a trunk to 3CX phone system and created a routepattern with the particular extension.

But I am getting an error message below

SIP/2.0 407 Proxy Authentication Required

Any idea?

[Roger Kallberg]

Looks like the 3CX system requires authentication. How have you defined the SIP trunk between the two systems, is it in CM directly or do you have a Cube in-between? I doubt that CM has the ability to do authentication on SIP trunks, so you’d need to have a Cube in the path towards the 3CX system to be able to do this.

[pbinojgeorge@gmail.com]

@Roger Kallberg Thanks for the Reply

It directly from the CM to 3CX system.

[Roger Kallberg]

Possibly you might be able to change the SIP trunk security profile to one of the secure options, but I never used this for authentication on a trunks so I don't have first hand experience with it. Maybe someone else in the community does?

[Nithin Eluvathingal]

Before making changes  go through the below link. 

https://www.3cx.com/community/threads/proxy-authentication-required.31495/

https://community.cisco.com/t5/ip-telephony-and-phones/cucm-11-5-sip-trunk-to-3cx/td-p/3043547?dtid=osscdc000283